When Beckett discovers that the victim in Sucker Punch
was killed by the same person who murdered her mother, she doubts her ability to continue with the case. Fortunately, she has Castle in her corner. He asks Beckett if she knows why he chose her as his inspiration for Nikki Heat. She hasn't a clue. Castle says, "Because you're tall. Now go in there and do your job." It's the perfect tension-breaker to get Beckett back on track to do what she does bestâ€”catch killers.